AI BriefingHow to protect the styles of a new project with shadow DOM
Key point
Inflearn adopted shadow DOM to resolve CSS style conflicts between its existing service and a new React app.
Details
Inflearn has been experiencing an issue where the Bulma framework and global styles of its existing service affect the new modern-stack app. In particular, global styles using tag selectors break the component styles of the new design system.
To solve this, three approaches were reviewed.
- Using !important: a short-term solution but hard to maintain.
- Using SCSS's not selector: allows excluding specific classes but cannot access style variables.
- Using shadow DOM: the most fundamental way to isolate styles from the outside.
As a result, they used shadow DOM to isolate the React app being migrated from the existing HTML structure. For this, they used the react-shadow library to create a Shadow root, building an environment where independent styles can be maintained without interference from external styles.
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